Changing only code count changes the LSB. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Eight codes make one-volt steps

The eight-code ladder has LSB 1 volt.

8 V/8=1 V8\ \text{V}/8=1\ \text{V}
Coarse ladderThe range stays eight volts.rangelsb

Sixteen codes make half-volt steps

The same range with 16 codes gives LSB 1/2 volt.

8 V/16=12 V8\ \text{V}/16={1\over 2}\ \text{V}
Finer ladderOnly the code count changed.rangelsb